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December Weather in Hayden, United States

Last updated: June 24, 2025

In December, the average temperature in Hayden, United States hovers around -6°C (22°F). Expect minimums of -24°C (-12°F) and occasional maximums reaching 13°C (55°F). With an average humidity of 85%, it’s a chilly time of year, accompanied by 59 mm (2.3 in) of precipitation spread over about 10 days.

December Temperature in Hayden

In December in Hayden, the average temperature is -6°C (22°F), with a maximum reaching 13°C (55°F) and a minimum dipping as low as -24°C (-12°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for cold weather excursions.

December Weather in Hayden: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Hayden, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayden, December typically has an average temperature of -6°C (22°F), with highs reaching up to 13°C (55°F) and lows dropping to around -24°C (-12°F).
JanFebMarAprMayJunJulAugSepOctNovDec212432384962696759413222
Data source: Temperature data for Hayden generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Hayden

In Hayden in December, the precipitation amount is 59 mm (2.3 in) over the course of 10 days.

December Precipitation Trends in Hayden

The chart displays monthly precipitation patterns in Hayden, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Hayden, December typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec536957525920101423544459
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hayden

In Hayden in December humidity is 85%. With an average temperature of -6°C (22°F), this humidity feels like an icy mist clinging to your skin, making outdoor activities uncomfortably chilly and causing your breath to cloud in the cold air, leaving you yearning for warmth and cozy indoor retreats while traveling.

December Average Humidity in Hayden

This chart illustrates the average monthly humidity levels in Hayden, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Hayden is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%86%75%67%67%68%62%63%63%72%80%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hayden

In Hayden in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Hayden, you can check the information here.

Maximum UV Index Levels in Hayden for December

The chart shows the monthly maximum UV Index (UVI) for Hayden in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Hayden typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111213121110753
Data source: Hayden December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Hayden Compares to Other Months

Weather in Hayden varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hayden, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Hayden, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)53 mm (2.1 inches)84%moderate
February Weather-5°C (24°F)69 mm (2.7 inches)85%high
March Weather0°C (33°F)57 mm (2.2 inches)75%very high
April Weather3°C (38°F)52 mm (2.0 inches)67%extreme
May Weather9°C (49°F)59 mm (2.3 inches)67%extreme
June Weather17°C (62°F)20 mm (0.8 inches)68%extreme
July Weather21°C (70°F)10 mm (0.4 inches)62%extreme
August Weather20°C (68°F)14 mm (0.5 inches)63%extreme
September Weather15°C (60°F)23 mm (0.9 inches)63%very high
October Weather5°C (42°F)54 mm (2.1 inches)72%high
November Weather0°C (32°F)44 mm (1.7 inches)79%moderate
December Weather-6°C (22°F)59 mm (2.3 inches)85%moderate

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